Biodegradable net

Abstract

A biodegradable net comprising a polymeric composition comprising—a polymer selected from the group consisting of polyhydroxyalkanoate (PHA), copolymer of 1,4-butanediol, succinic acid and adipic acid (PBSA), polybutylene succinate (PBS) or mixtures thereof—at least one functional additive selected from the group consisting of Pentaerythrol tetrakis (3-(3,5-di-tert-butyl-4-hy-droxyphenyl)propionate), Octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate Tris (2, 4-di-tert-butylphenyl) phosphite, 1,3,5-Trimethyl-2, 4, 6-tris-(3, 5-di-tert-butyl-4-hydroxybenzyl) benzene, 2,4-Bis [(Octyl thio) methyl)]-o-cresol, 2,2′-dihydroxy-4, 4′-dimethoxy-benzophenon, Ethylene bis-(oxyethylene) his-(3-(5-tert-butyl-4-hydroxy-m-tolyl)propionate), Octadecyl-[3-(3, 5-di-tert-butyl-4-hydroxy) propionate, 2′,3-Bis[[3-[3,5-di-tert-butyl-4-hydroxyphenyl]propionyl]]propionohydrazide, Beeswax, Carnauba wax, Candelilla wax, Sumac wax (Japanese wax), Berry wax, Paraffin wax, Silicone and its derivatives, and mixtures thereof—a nucleant selected from the group consisting of Boron Nitride, Hydroxyhepatite, Zinc Stearate, Nanocrystalline Cellulose, Montmorillonite nano clay, Single wall carbon nanotube, Multi wall carbon nanotube, Cyanuric acid, Fatty acids, Fatty acid esters, Fatty acid amines, Fatty acid metal salts, pentaerythritol, di-pentaerythritol, urea derivatives, sorbitol-based compounds, sodium benzoate and mixtures thereof.

1 . A biodegradable net comprising a polymeric composition comprising:
 a polymer selected from the group consisting of polyhydroxyalkanoate (PHA), copolymer of 1,4-butanediol, succinic acid and adipic acid (PBSA), polybutylene succinate (PBS) and mixtures thereof;   at least one functional additive selected from the group consisting of Pentaerythrol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate), Octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate Tris(2,4-di-tert-butylphenyl)phosphite, 1,3,5-Trimethyl-2,4,6-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, 2,4-Bis[(Octylthio)methyl)]-o-cresol, 2,2′-dihydroxy-4,4′-dimethoxy-benzophenon, Ethylene bis-(oxyethylene) bis-(3-(5-tert-butyl-4-hydroxy-m-tolyl)propionate), Octadecyl-[3-(3,5-di-tert-butyl-4-hydroxy)propionate, 2′,3-Bis[[3-[3,5-di-tert-butyl-4-hydroxyphenyl]propionyl]]propionohydrazide, Beeswax, Carnauba wax,  Candelilla  wax,  Sumac  wax (Japanese wax), Berry wax, Paraffin wax, Silicone and its derivatives, and mixtures thereof; and   a nucleant selected from the group consisting of Boron Nitride, Hydroxyhepatite, Zinc Stearate, Nanocrystalline Cellulose, Montmorillonite nano clay, Single wall carbon nanotube, Multi wall carbon nanotube, Cyanuric acid, Fatty acids, Fatty acid esters, Fatty acid amines, Fatty acid metal salts, pentaerythritol, di-pentaerythritol, urea derivatives, sorbitol-based compounds, sodium benzoate and mixtures thereof.   
     
     
         2 . The biodegradable net according to  claim 1 , wherein the polymer comprises at least the copolymer of 1,4-butanediol, succinic acid and adipic acid (PBSA) and polyhydroxyalkanoate (PHA). 
     
     
         3 . The biodegradable net according to  claim 1 , wherein the polymer comprises polyhydroxyalkanoate (PHA) and said polyhydroxyalkanoate (PHA) is present in an amount by weight relative to the amount of total polymers in the polymeric composition between 10 and 90%. 
     
     
         4 . The biodegradable net according to  claim 1 , further at least one plasticizer selected from the group consisting of poly(ethylene glycol) (PEG), acetyl-tri-n-butyl citrate (ATBC), isosorbide diester (ISE), sorbitol, glycerol, Acetylated monoglycerides, Epoxidized soybean oil (ESBO), Triethyl citrate (TEC), tri (ethylene glycol) bis(2-ethyl hexanoate) (TEG-EH), Tributyl citrate (TBC), 1,3,2,4-dibenzylidene sorbitol, 1,3-p-methylbenzylidene-2,4-benzylidenesorbitol, bis (stearylureide) hexane, 1,3,2,4-di (p-methylbenzylidene) sorbitol, 1,3,2,4-dibenzylidenesorbitol, and mixtures thereof. 
     
     
         5 . The biodegradable net according to  claim 1 , comprising at least 80% by weight of the total weight of the net, the polymer selected from the group consisting of polyhydroxyalkanoate (PHA), copolymer of 1,4-butanediol, succinic acid and adipic acid (PBSA), polybutylene succinate (PBS) or mixtures thereof. 
     
     
         6 . The biodegradable net according to  claim 1 , wherein the nucleant is selected from the group consisting of Boron Nitride, Montmorillonite Nano Clay, pentaerythritol, and di-pentaerythritol. 
     
     
         7 . The biodegradable net according to  claim 1 , wherein the at least one functional additive is selected from the group consisting of Beeswax, Carnauba Wax,  Candelilla  Wax,  Sumac  Wax (Japanese wax). 
     
     
         8 . The biodegradable net according to  claim 1 , further comprising at least one viscosity modifier and/or one compatibilizer selected from the group consisting of DCP dicumyl peroxide, TBPB of tert. Butylperoxybenzoate, Hexamethylene diisocyanate (HMDI), Multifunctionalized styrene-co-glycidyl methacrylate oligomer (Joncryl®), Triglycidyl isocyanurate (TGIC), Benzoyl peroxide (BPO), and Methylene diphenyl diisocyanate (MDI). 
     
     
         9 . The biodegradable net according to  claim 1 , further comprising a viscosity modifier and/or a compatibilizer selected from the group consisting of dicumyl peroxide, TBPB of tert. Butylperoxybenzoate, multifunctionalized styrene-co-glycidyl methacrylate oligomer (Joncryl®) and mixtures thereof. 
     
     
         10 . The biodegradable net according to  claim 1 , wherein the Polymeric composition does not comprise PLA (polylactide acid). 
     
     
         11 . A process for making a biodegradable net according to  claim 1 , comprising:
 forming a polymeric compound comprising a polymer selected from the group consisting of polyhydroxyalkanoate (PHA), copolymer of 1,4-butanediol, succinic acid and adipic acid (PBSA), polybutylene succinate (PBS) or mixtures thereof-;   melting the polymer compound in a first extrusion step;   forming granules from the melted material;   drying the granules; and   forming a tubular net in a second extrusion step.   
     
     
         12 . The process for making a biodegradable net according to  claim 11 , wherein the first extrusion step takes place using a screw extruder. 
     
     
         13 . The process for making a biodegradable net according to  claim 11 , further comprising adding a plasticizer in an amount of between 1 and 50% by weight to the total weight of the polymeric compound. 
     
     
         14 . The process for making a biodegradable net according to  claim 11 , wherein said second extrusion step takes place using a rotary head extruder. 
     
     
         15 . (canceled) 
     
     
         16 . A method, comprising using the biodegradable net according to  claim 1  for packaging or as a medical or agricultural containment net.